Perhaps you should try some spelling variations:
thanh trien » thanh tien, thanh truyen, thanh vien
trien thuat » thien thuat, trien hoat, chien thuat
cuong cong » cong cong, duong cong, dung cong
luong cong » dung cong, trong cong, cong cong
chau tinh » cuu tinh, ha tinh, cac tinh
cua tinh » cua sinh, va tinh, ha tinh
tap toan » tap doan, tap quan, bai toan
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chau tinh) OR (cua tinh)) - thanh trien thuat ((cuong cong) or (luong cong)) tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chau tinh) OR (cua tinh)) - thanh trien thuat ((cuong cong) OR (luong cong)) tap toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chau tinh) OR (cua tinh)) - thanh trien thuat ((cuong cong) or (luong cong)) tap toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chau tinh) OR (cua tinh)) - thanh trien thuat ((cuong cong) or (luong cong)) tap toan cau*.